Yeah in the current combat situations we players from (alpha/beta/gamma) could think Shield Cells may be seen as over powered, but we dont yet know what they have in store for us with up comming events, if you think about it, what if there is many players or ships shooting you in a warzone, what if you are flying past multiple capital class ships, and many turreted anacondas... them shield cells are going to run out fast.
So before we all cry OP, might be wise to think whats in store for us first.